If you have lost your Samsung Security code you can reset your phone by using the code below

this is also useful for removing unwanted video photos etc off your phone as it resets everything

(very useful for phones just bought off ebay as many contain much trash!)

But it should only be used as a last resort as it removes contacts msg's etc

Start phone up without Sim, then enter this code and leave the phone for a few minutes to restart

*2767*3855#